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机构:
Sun Yat Sen Univ, Sch Publ Hlth Shenzhen, Shenzhen 518107, Peoples R China
Qingdao Univ, Qingdao Women & Childrens Hosp, Qingdao, Shandong, Peoples R China
Chinese Univ Hong Kong, Fac Med, Dept Paediat, Hong Kong, Peoples R China Chongqing Med Univ, Dept Otorhinolaryngol, Affiliated Hosp 1, Chongqing, Peoples R China